Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 6th Sem New 2162005 Electro Mechanical Measurements And Instruments Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code:2162005 Date:27/11/2018
Subject Name:Electro Mechanical Measurements & Instruments
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Explain the significance of ?Signal Conditioning? in
measurement system with suitable example.
03
(b) Differentiate between (i) Threshold and Resolution (ii)
Repeatability and Reproducibility with suitable examples.
04
(c) Classify the transducers with suitable examples and neat
sketches.
07
Q.2 (a) Explain the ?Systematic Errors? in measurement with suitable
examples.
03
(b) Derive the second order system expression with suitable
example and neat sketch.
04
(c) Discuss the AC and DC errors encountered in moving iron
instruments along with its remedies.
07
OR
(c) Discuss the various standards in measurement in detail. 07
Q.3 (a) What is ?Thermopile? and discuss its advantages over
thermocouple in measurement.
03
(b) Justify that Wheatstone bridge is not suitable for measurement
of low and high resistance.
04
(c) List the various techniques for measuring vibrations and
elaborate any one in detail.
07
OR
Q.3 (a) Explain why calibration is required for secondary standard
instruments with suitable example.
03
(b) Discuss ?Rope Brake Dynamometer? for measuring shaft
torque.
04
(c) Explain the basic construction, working principle and operation
of RTD.
07
Q.4 (a) Explain ?Tertiary measurements? with suitable example. 03
(b) Explain how DC potentiometer is employed for calibrating DC
voltmeter with neat diagram.
04
(c) With the help of suitable diagram explain that how differential
arrangement of capacitive transducer gives the linear response.
07
OR
Q.4 (a) Compare the electrical instruments with mechanical
instruments.
03
(b) With schematic diagram explain optical torsion meter. 04
(c) Derive the output voltage expression of full bridge (Wheatstone
Bridge) circuit for strain measurement and give its advantages
over half and quarter bridge circuits.
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code:2162005 Date:27/11/2018
Subject Name:Electro Mechanical Measurements & Instruments
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Explain the significance of ?Signal Conditioning? in
measurement system with suitable example.
03
(b) Differentiate between (i) Threshold and Resolution (ii)
Repeatability and Reproducibility with suitable examples.
04
(c) Classify the transducers with suitable examples and neat
sketches.
07
Q.2 (a) Explain the ?Systematic Errors? in measurement with suitable
examples.
03
(b) Derive the second order system expression with suitable
example and neat sketch.
04
(c) Discuss the AC and DC errors encountered in moving iron
instruments along with its remedies.
07
OR
(c) Discuss the various standards in measurement in detail. 07
Q.3 (a) What is ?Thermopile? and discuss its advantages over
thermocouple in measurement.
03
(b) Justify that Wheatstone bridge is not suitable for measurement
of low and high resistance.
04
(c) List the various techniques for measuring vibrations and
elaborate any one in detail.
07
OR
Q.3 (a) Explain why calibration is required for secondary standard
instruments with suitable example.
03
(b) Discuss ?Rope Brake Dynamometer? for measuring shaft
torque.
04
(c) Explain the basic construction, working principle and operation
of RTD.
07
Q.4 (a) Explain ?Tertiary measurements? with suitable example. 03
(b) Explain how DC potentiometer is employed for calibrating DC
voltmeter with neat diagram.
04
(c) With the help of suitable diagram explain that how differential
arrangement of capacitive transducer gives the linear response.
07
OR
Q.4 (a) Compare the electrical instruments with mechanical
instruments.
03
(b) With schematic diagram explain optical torsion meter. 04
(c) Derive the output voltage expression of full bridge (Wheatstone
Bridge) circuit for strain measurement and give its advantages
over half and quarter bridge circuits.
07
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2
Q.5 (a) Explain different modes of measurements. 03
(b) Explain that how the range of PMMC instruments can be
extended as an ammeter with suitable diagram.
04
(c) Discuss the operation of ?Proving Ring? type load cell in detail. 07
OR
Q.5 (a) Compare between Wire and Foil type strain gauges for
measuring strain.
03
(b) Describe the working of ?Piezoelectric Accelerometer?. 04
(c) Draw the functional block diagram of digital data acquisition
system and explain the roll of each block.
07
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This post was last modified on 20 February 2020